What does that mean? I decided to learn the old Gregg since I really don't use it for my job. And I like the old one (even though it's harder with all the BF and shortcuts and abbreviations...) and thought it would be fun.

It's called Gregg Shorthand Functional Method. The last copywright was 1936 and it says, arranged in accordance with the Anniversary edition of Gregg Shorthand.

So I did a search. Appanetly there's a Functional Method, Series 90 and Functional Method, DJS.